/*
 * This file is part of JFlowMap.
 *
 * Copyright 2009 Ilya Boyandin
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package fons.navigator.util;

import java.awt.geom.Point2D;

/**
 * Immutable Point implementation.
 *
 * @author Ilya Boyandin
 */
public final class Point {

	private final double x;
	private final double y;

	public Point(double x, double y) {
		this.x = x;
		this.y = y;
	}

	public double x() {
		return x;
	}

	public double y() {
		return y;
	}

	public double distanceTo(Point point) {
		double dx = point.x() - x;
		double dy = point.y() - y;
		return Math.sqrt(dx * dx + dy * dy);
	}

	public Point2D asPoint2D() {
		return new Point2D.Double(x, y);
	}

	public static Point valueOf(Point2D point) {
		return new Point(point.getX(), point.getY());
	}

	@Override
	public String toString() {
		return "Point [x=" + x + ", y=" + y + "]";
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		long temp;
		temp = Double.doubleToLongBits(x);
		result = prime * result + (int) (temp ^ (temp >>> 32));
		temp = Double.doubleToLongBits(y);
		result = prime * result + (int) (temp ^ (temp >>> 32));
		return result;
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Point other = (Point) obj;
		if (Double.doubleToLongBits(x) != Double.doubleToLongBits(other.x))
			return false;
		if (Double.doubleToLongBits(y) != Double.doubleToLongBits(other.y))
			return false;
		return true;
	}

}
